Chemical apparatus.



" No. 679,388. Patented July 30, mm. .u. F. w. MEYER.

CHEMICAL APPARATUS.

(Application filed Jan. 16, 1900.) (No Model.) 2 Sheets-Sheet l.

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No. 679,388. Patented July 30, l90l;

- J. F.- W. MEYER.

CHEMICAL APPARATUS.

(Application filed Jan. 16, 1900.) v (No Model.) 2 Sheets-Sheet 2.

JOHANN F. W. MEYER, OF SOHEUNE, NEAR STETTIN, GERMANY.

CHEMICAL APPARATUS SPECIFICATION forming part of Letters Patent No.679,388, dated July 30, 1901. Application filed January 16, 1900. SerialNo. 1,596. (No model.)

To all whom it may concern:

Be it known that I, J OHANN F. W. MEYER, a subject of the Emperor ofGermany, residing at Scheune, near Stettin, Germany, have invented a newand useful Measuring Apparatus for Fluids, of which the following is aspecification.

My invention consists of a new and improved measuring apparatus forfluids, such as are used in chemical experiments, in selling fluids,(be. The most important advantage in this apparatus is the storingvessel from which the fluid to be measured is drawn and which is soconstructed that the fluid levels in it and in the measuring-tubeattachment are held-constant, through which such quantity of fluid thatmay overflow from the said tube is collected and driven back into thestorage by the air-pressure formed by the next entrance of the fluid inthe tube aforesaid.

In the accompanying drawings, which form an inseparable part of thespecification, similar letters refer throughout to similar parts.

Figure 1 shows in side View, part in section, a fluid-measure embodyingmy invention. Fig. 2 shows in modified form a measuring device forfluids embodying my invention.

In the construction of my invention I employ a measuring tube or pipeI), which may 5 be short and thick, as shown in Fig. 1, or may belonger, as seen in Fig. 2. To the lower end of this pipe or tube Isecure a valve 0, having connected thereto a nozzle 7c. Connected to thesaid valve is apipef, which in turn is connected with a pipe 2', whichlatter is entered into a store vessel a. The connected pipes f and 2'form in connection with tube b a siphon-like contrivance and serve todraw the fluid out from the said vessel and carry the same down into thesaid tube when valve is in the proper position.

Formed on the upper end of tube is a projection d, while around aboutthe same and also integral with said tube is a bulb e. In connectionwith bulb c is a pipe g,which is connected to pipe h, which latterenters vessel a aforesaid. It will be thus seen that any fluidoverflowing from tube 6 passes through d and is caught in bulb e, fromwhich latter it is led through pipes g h back to the vessel a, thuspreventing any overflow with resulting loss or danger.

The vessel a may be provided with two openings m and n, as shown in Fig.1, in which the pipes h and t' ent'er (pipe 2' extending to the lowerportion of vessel a) through m, while the vessel can be filled throughn, or it may have a single neck-opening m, (shown in Fig. 2,) locatednear the base of said vessel and having the different pipes 2', h, and 0all entering therethrough. It will be also seen that in the latterarrangement the weight of the fluid adds to the last in forming a highairpressure for driving back the overflow, as will now be seen.

The operation of the apparatus will be clearly understood from theaccompanying drawings, foregoing description, and the followingstatement: siphonic act-ion is first started through air admittedthrough the small pipe at at the upper right-hand top of the reservoir.Opening outlet-pipe 7t, a certain quantity of air is forced through tubeb and pipes g and 72, which are connected thereto, into vessel a. Thefluid flows through pipes and f.v The valve 0 is now so adjusted as toallow the said fluid to enter tube I). Here most likely an overflow willoccur which is collected in bulb c. When next using the device, thefluid on entering tube 1) forces the air therein upward, which in turndrives the collected overflowed fluid through pipes g and it back intothe vessel. However, when I employ a vessel as shown in Fig. 2 theweight of any suitable fluid is added toincrease the air-pressure, thuseven more facilitating the return flow. It will be seen, however, thatthe levels of the two fluids are kept constant, inasmuch as in eachinstance the pressure developed between is sufflcient to drive the fluidback. However, the form of vessel shown in Fig. 2 is preferable, ashere, since pipe 2' drains from the bottom the pressure developed,

which for clearness I designate w, is unvarying in regard to the amountof fluid in vessel to, while the resistance from bulb (2 back to thevessel 3; is also unvariable, whereas in that form as shown in 1 0cvaries; but in each instance w exceeds y.

2 erases Having now described my invention, that which I claim as new,and desire to protect by Letters Patent, is-

1. In a fluid-measuring apparatus the combination of a store vessel, aneck opening therein, a pipe 1' entering therethrough, a pipe It alsopassing therethrough and both in connection respectively with pipes fand g, the bulb e, and a measuring-bulb b in connection therewith, allsaid parts being so arranged that the fluid-levels in the differentpipes aforesaid are kept constant, substantially as described.

2. In a fluid-measurin g apparatus, the combination of a vessel, a neckopening therein, a measuring-tube, a projection on said tube, a bulbalso on said tube and about said projection, pipes connecting said bulband said vessel, a valve on the lower end of said tube and pipesconnecting said valve and said vessel substantially as described.

3. In a fluid-measuring apparatus, the combination of a closed vessel, ameasuring-tube,

a bulb surrounding the upper end thereof, pipes connecting said tube andsaid vessel and other pipes connecting said bulb and said vessel andadapted to lead the overflow from said tube back to said vessel,substantially as described.

4. In a new and improved fluid-measuring device, the combination of ameasurin g-tube,a vessel; a neck opening in the lower part thereof, avalve on the lower end of said tube, pipes connecting said valve andvessel, a projection on the upper end of said tube, a bulb about saidprojection, pipes also connecting said bulb and said vessel, all soarranged that through flow of fluid from said vessel to said tube suchoverflow in said bulb is forced back into said vessel substantially asdescribed.

In testimony whereof I have hereunto set my hand this 16th day ofAugust, 1899.

.I. F. V. MEYER.

lVitnesses:

GEORG ROSENBERG, CARL FREESE.

